/* Styles for Simple Linear Regression Calculator */
.calcufacil-linear_regression.calcufacil-container {
    max-width: 850px; margin: 25px auto; background: #fdfdfd; padding: 25px;
    border-radius: 10px; box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    display: flex; flex-direction: row; flex-wrap: wrap; gap: 30px;
    font-family: 'Arial', sans-serif; border: 1px solid #303F9F; /* Indigo for stats/analysis */
    box-sizing: border-box;
}
.calcufacil-linear_regression.calcufacil-container *,
.calcufacil-linear_regression.calcufacil-container *::before,
.calcufacil-linear_regression.calcufacil-container *::after { box-sizing: border-box; }

.calcufacil-linear_regression h2 {
    width: 100%; text-align: center; color: #1A237E; /* Darker Indigo */
    margin-top:0; margin-bottom: 15px; font-size: 1.6em;
}
.calcufacil-linear_regression .calcufacil-left.calculator-form {
    flex: 1.3; /* More space for two textareas */
    min-width: 380px; padding: 20px; background-color: #fff;
    border-radius: 8px; box-shadow: 0 2px 8px rgba(0,0,0,0.05); border: 1px solid #E8EAF6;
}
.calcufacil-linear_regression .calcufacil-right.results {
    flex: 1; min-width: 320px; background: #E8EAF6; /* Lightest Indigo */
    padding: 25px; border-radius: 8px; border: 1px solid #C5CAE9; /* Light Indigo */
    box-shadow: 0 2px 8px rgba(0,0,0,0.05); display: flex; flex-direction: column;
    justify-content: flex-start; align-items: center;
}
.calcufacil-linear_regression .data-input-columns {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
}
.calcufacil-linear_regression .data-column {
    flex: 1;
}
.calcufacil-linear_regression .input-group { margin-bottom: 10px; } /* Reduced for columns */
.calcufacil-linear_regression label {
    display: block; font-weight: 600; color: #0D47A1; /* Deep Blue */
    margin-bottom: 6px; font-size: 0.95em;
}
.calcufacil-linear_regression textarea {
    width: 100%; padding: 10px; border: 1px solid #9FA8DA; /* Medium Light Indigo */
    border-radius: 5px; font-size: 0.95em; background: #FAFAFF; font-family: Consolas, Monaco, monospace;
    line-height: 1.6; min-height: 180px;
}
.calcufacil-linear_regression textarea:focus {
    border-color: #3F51B5; box-shadow: 0 0 0 2px rgba(63, 81, 181, 0.2); outline: none;
}
.calcufacil-linear_regression .note { font-size: 0.85em; color: #303F9F; margin-bottom:15px; line-height: 1.4; text-align: left;}


.calcufacil-linear_regression button[type="submit"] {
    background-color: #3F51B5; /* Indigo */ color: #fff; padding: 12px 25px;
    border: none; border-radius: 5px; cursor: pointer; font-size: 1.05em;
    width: 100%; transition: background-color 0.3s ease; font-weight: 600; margin-top:10px;
}
.calcufacil-linear_regression button[type="submit"]:hover { background-color: #303F9F; /* Darker Indigo */ }

/* Results Styling */
.calcufacil-linear_regression .results-header h2 { color: #1A237E; margin-bottom: 20px; font-size: 1.4em; }
.calcufacil-linear_regression .initial-message {
    text-align: center; color: #1A237E; font-style: italic; padding: 20px;
    background-color: #E8EAF6; border: 1px dashed #9FA8DA; border-radius: 5px; width:100%;
}
.calcufacil-linear_regression .calculation-summary { width: 100%; margin-bottom: 20px; }
.calcufacil-linear_regression .calculation-desc { font-size: 1.05em; color: #0D47A1; margin-bottom: 15px; text-align:center; }
.calcufacil-linear_regression .calculation-desc strong { font-weight: bold; }

.calcufacil-linear_regression .main-result {
    display: flex; justify-content: space-between; align-items: center;
    background-color: #C5CAE9; /* Light Indigo */ padding: 10px 15px; border-radius: 4px;
    border: 1px solid #9FA8DA; font-size: 1em; color: #1A237E;
    margin-bottom: 6px; width: 100%;
}
.calcufacil-linear_regression .main-result .math-eq { font-family: Consolas, Monaco, 'Courier New', monospace; font-weight:bold;}
.calcufacil-linear_regression .main-result.info-result { background-color: #E8EAF6; border-color: #C5CAE9; color:#283593;}
.calcufacil-linear_regression .main-result.final-result {
    background-color: #303F9F; /* Darker Indigo */ color: #fff; font-size: 1.2em;
    padding: 12px 18px; border-color: #283593; font-weight: bold;
}
.calcufacil-linear_regression .main-result span:first-child { text-align:left; padding-right: 10px;}
.calcufacil-linear_regression .main-result span:last-child { font-weight: bold; text-align:right; font-family: Consolas, Monaco, monospace; }

.calcufacil-linear_regression .interpretation-notes {
    margin-top: 20px;
    padding: 15px;
    background-color: #e3f2fd;
    border: 1px solid #bbdefb;
    border-radius: 5px;
    font-size: 0.9em;
    color: #0d47a1;
    text-align: left;
}
.calcufacil-linear_regression .interpretation-notes p { margin: 0 0 8px 0; }
.calcufacil-linear_regression .interpretation-notes strong { color: #01579b; }


.calcufacil-linear_regression .errors {
    color: #B71C1C; background-color: #FFEBEE; border: 1px solid #FFCDD2;
    padding: 10px 15px; border-radius: 4px; margin: 15px 0; text-align: center; width:100%;
}
.calcufacil-linear_regression .errors ul { list-style: none; padding: 0; margin: 0; }

/* Responsive */
@media (max-width: 768px) {
    .calcufacil-linear_regression.calcufacil-container { flex-direction: column; gap: 20px; padding: 15px; }
    .calcufacil-linear_regression .calcufacil-left.calculator-form,
    .calcufacil-linear_regression .calcufacil-right.results { min-width: unset; width: 100%; }
    .calcufacil-linear_regression .data-input-columns { flex-direction: column; gap: 10px;}
}